Open natbprice opened 5 years ago
breeding bird survey data by bird conservation regions (BCRs)? http://nabci-us.org/resources/bird-conservation-regions/
i am trying to visualize what you mean here, are you thinking that the line width will represent # of birds per species (frequency), or # of species (richness)?
It might be good to add another dataset related to ecology. For example, items = species and sets = geographic regions.
See http://r-pkgs.had.co.nz/data.html